Perturbative signatures of a superimposed quantum universe

10 Jul 2025, 11:45
20m
Amphithéâtre Charpak (LPNHE)

Amphithéâtre Charpak

LPNHE

4 Place Jussieu 75005 Paris Tour 22
Oral contribution WG1 High Energy QG Theory 4

Speaker

Dr Lisa Mickel (IAP)

Description

In the quest of finding a quantum description of the early universe, we consider a quantised flat FLRW background together with quantum perturbations. We compute quantum trajectories for a universe that can be in a superposition of semiclassical background (and perturbation) states and investigate how the evolution of cosmological perturbations is influenced by the quantum nature of the background. It is of particular interest whether and how such quantum effects can translate into imprints on observable quantities. In addition to probing the quantum nature of our universe, our results thereby pave the way to obtain insights into the physical consequences of ambiguities in the
quantum theory.

Working Group WG1 - High Energy QG Theory

Author

Dr Lisa Mickel (IAP)

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